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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .nav  a{
            
            /* 行内元素转换为行内块元素 */
            display: inline-block;
            width: 120px;
            height: 48px;
            background-color: antiquewhite;
            text-align: center;
           
            /* 垂直居中行高等于盒子的高 */
            line-height: 58px;

            /* 字体颜色 */
            color: #fff;

            /* 去除下划线 */
            text-decoration: none;
        }
        .nav .bg1{
            background: url(img/bgimg.png) no-repeat;
        }

        .nav .bg1:hover{
            background-image: url(img/bl.png);
        }



        .nav .bg2{
            background: url(img/bgimg.png) no-repeat;
        }

        .nav .bg2:hover{
            background-image: url(img/bl.png);
        }

        .nav .bg3{
            background: url(img/bgimg.png) no-repeat;
        }

        .nav .bg3:hover{
            background-image: url(img/bl.png);
        }

        .nav .bg4{
            background: url(img/bgimg.png) no-repeat;
        }

        .nav .bg4:hover{
            background-image: url(img/bl.png);
        }


        .nav .bg5{
            background: url(img/bgimg.png) no-repeat;
        }

        .nav .bg5:hover{
            background-image: url(img/bl.png);
        }
    </style>
</head>

<body>
    <div class="nav">
    <a href="#" class="bg1">五彩导航</a>
    <a href="#" class="bg2">五彩导航</a>
    <a href="#" class="bg3">五彩导航</a>
    <a href="#" class="bg4">五彩导航</a>
    <a href="#" class="bg5">五彩导航</a>
    </div>
</body>

</html>